KF in water; acetone addn. of KF in water to refluxing soln. of Sn-compound in acetone, refluxing for 3 h; concn., filtn. and recrystn. from toluene;

in diethyl ether; toluene byproducts: MgBr2; toluene soln. of stannane added to organomagnesium compd. (prepd. in dry ether); heated at the b.p. of toluene (ether distd. off) until a test for bromine was neg. (15 h); cooled; hydrolyzed; org. layer sepd., washed, dried, solvent driven off; recrystd. (propyl alcohol); IR; PMR; elem. anal.;

in diethyl ether; toluene byproducts: MgBr2; toluene soln. of stannane added to organomagnesium compd. (prepd. in dry ether); heated at the b.p. of toluene (ether distd. off) until a test for bromine was neg. (15 h); cooled; hydrolyzed; org. layer sepd., washed, dried, solvent driven off; recrystd. (propyl alcohol); IR; PMR; elem. anal.;

in toluene; Petroleum ether toluene soln. of stannane added to tolyllithium (prepd. in petroleum ether); heated until a test for bromine was neg. (15 h); cooled; hydrolyzed; org. layer washed, dried, solvent driven off; recrystd. (propyl alcohol); elem. anal.; IR; PMR;

in diethyl ether; toluene byproducts: MgBr2; toluene soln. of stannane added to organomagnesium compd. (prepd. in dry ether); heated at the b.p. of toluene (ether distd. off) until a test for bromine was neg. (30 h); cooled; hydrolyzed; org. layer sepd., washed, dried, solvent driven off; recrystd. (propyl alcohol); IR; PMR; elem. anal.;

in diethyl ether refluxing with LiAlH4 for 3 h under N2;;

NaOH in diethyl ether addn. of aq. NaOH to a soln. of Sn-compd. in diethyl ether, refluxing for 6 h; filtn., recrystn. from ethanol;

in hydrogenchloride recrystn. (Me2CO); elem. anal.;